Crossword Genius

Excursion for go-getters? (4)

Ross

I believe the answer is:

raid

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But I can't explain it at all! Could you help me understand?

(Other definitions for raid that I've seen before include "Inroad" , "Sudden short attack" , "bust" , "Search by police without warning" , "Rapid surprise attack" .)

I've seen this clue in the Evening Standard.
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